CERRO RICO, Bolivia (Reuters) - Next to one of Bolivia's poorest cities lies one of the richest silver mines in the history of mankind - Cerro Rico, Spanish for 'Rich Mountain - a once-legendary source of wealth for the Spanish Empire that is now being dug out by artisanal miners.
The miners - independent workers who labor in dangerous conditions in dark and poorly-ventilated tunnels - live off what they earn from the scraps of silver they find in Cerro Rico, which is slowly sinking and collapsing onto itself.
